Shell Drawing #4

For this shell drawing turned out all right, I liked how the third one turned out better. I tried to combine two different colors, brown and orange, to get a wider range of colors. With this shell drawing it seemed harder to control the ink and would wash off color in parts on the drawing I wanted to keep.  Also the charcoal mixed more with the color, changing it so it looked like a bluish / grayish tint. Some of the contour lines on the tail of the shell work but as you move forward the shape of the contour lines gets a little confusing. I probably should of used the shell more when trying to capture the lights and darks on the shell. Also with this shell is could of tried to make more emphasis on the plane changes in the front spirals.